Fix black formatting (use v22.3.0); drop architecture:x64 on macOS

architecture:x64 forced Rosetta on macos-15 ARM, causing Python 3.9/3.10
to fail with missing libintl.8.dylib. Removing it lets macOS use native
ARM builds. Windows x64 is unaffected (x64 remains the default there).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: h-g-s

.github/workflows/github-ci.yml

@@ -50,7 +50,6 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
-        architecture: x64
         allow-prereleases: false
 
     - name: Cache pip dependencies

mip/cbc.py

@@ -96,7 +96,8 @@
     has_cbc = False
 
 if has_cbc:
-    ffi.cdef("""
+    ffi.cdef(
+        """
     typedef int(*cbc_progress_callback)(void *model,
                                         int phase,
                                         int step,
@@ -543,7 +544,8 @@
     const char *Cbc_featureName(int i);
 
     void Cbc_reset(Cbc_Model *model);
-    """)
+    """
+    )
 
 CHAR_ONE = "{}".format(chr(1)).encode("utf-8")
 CHAR_ZERO = "\0".encode("utf-8")
@@ -1004,10 +1006,12 @@ def cbc_get_osi_name_indexes(osi_solver) -> Dict[str, int]:
             return nameIdx
 
         # progress callback
-        @ffi.callback("""
+        @ffi.callback(
+            """
             int (void *, int, int, const char *, double, double, double,
             int, int *, void *)
-        """)
+        """
+        )
         def cbc_progress_callback(
             model,
             phase: int,
@@ -1030,9 +1034,11 @@ def cbc_inc_callback(
             return
 
         # cut callback
-        @ffi.callback("""
+        @ffi.callback(
+            """
             void (void *osi_solver, void *osi_cuts, void *app_data, int level, int npass)
-        """)
+        """
+        )
         def cbc_cut_callback(osi_solver, osi_cuts, app_data, depth, npass):
             if (
                 osi_solver == ffi.NULL
@@ -1444,8 +1450,10 @@ def write(self, file_path: str):
         elif ".bas" in file_path.lower():
             cbclib.Cbc_writeBasis(self._model, fpstr, CHAR_ONE, 2)
         else:
-            raise ValueError("Enter a valid extension (.lp, .mps or .bas) \
-                to indicate the file format")
+            raise ValueError(
+                "Enter a valid extension (.lp, .mps or .bas) \
+                to indicate the file format"
+            )
 
     def read(self, file_path: str) -> None:
         if not isfile(file_path):
@@ -1474,8 +1482,10 @@ def read(self, file_path: str) -> None:
                 logger.info("Optimal LP basis successfully loaded.")
 
         else:
-            raise ValueError("Enter a valid extension (.lp, .mps or .bas) \
-                to indicate the file format")
+            raise ValueError(
+                "Enter a valid extension (.lp, .mps or .bas) \
+                to indicate the file format"
+            )
 
     def set_start(self, start: List[Tuple[Var, numbers.Real]]) -> None:
         # Augment start list with default zero values for absent non-continuous variables
@@ -1766,9 +1776,7 @@ def add_var(
             numnz = len(column.constrs)
 
         isInt = (
-            CHAR_ONE
-            if var_type.upper() == "B" or var_type.upper() == "I"
-            else CHAR_ZERO
+            CHAR_ONE if var_type.upper() == "B" or var_type.upper() == "I" else CHAR_ZERO
         )
         cbclib.Osi_addCol(
             self.osi,